The Watershed Transform::separate objects::please help

hi

i try to use Watershed Transform to separate touching objects

i read The Watershed Transform: Strategies for Image Segmentation

By Steve Eddins, MathWorks

www.mathworks.com/.../the-watershed-transform-strate...

i follow exact his code as below but no result i get

i think their a basic error in code

------------generate toching object-------

center1 = -10; 
center2 = -center1; 
dist = sqrt(2*(2*center1)^2); 
radius = dist/2 * 1.4; 
lims = [floor(center1-1.2*radius) ceil(center2+1.2*radius)]; 
[x,y] = meshgrid(lims(1):lims(2)); 
bw1 = sqrt((x-center1).^2 + (y-center1).^2) <= radius; 
bw2 = sqrt((x-center2).^2 + (y-center2).^2) <= radius; 
bw = bw1 | bw2; 
imshow(bw), title('bw');

%----------------separate object------------
D = ~bwdist(~bw); 
L=watershed(D);
BW(L == 0) = 0;
imshow(BW);
%-------------------------------------------
title('Distance transform of ~bw')

Answer 1

[Iain]

Should BW be bw?

[mangood UK]

same problem no result

can you test it for me

[Jeff E]

You've got a few steps wrong, and are missing a few in the middle.

doc watershed - example 1 has basically the same code and works for me. You should just be able to copy and paste to replicate. If you have an older version of Matlab, you can find it on the web: http://www.mathworks.com/help/images/ref/watershed.html

[mangood UK]

thank

it work

 but i test it with another image  look to the result

why the cycle was separated ??? do this need any processing to solve it